1. General Operation and Applications

The DL4500 hardware platform was designed to be a gateway which interfaces your
Ethernet TCP/IP or to AB’s Data Highway Plus (DH+), or DH-485 networks. Thus
extending the life of existing Allen-Bradley PLC’s and SLC’s without Ethernet
Interfaces. It comes in a DC powered Din-Rail Mountable compact cabinet for ease of
portability and installation. The DL4500 combines the Lantronix Ethernet
Microprocessor with our proven A-B interface.

The DL4500 comes with a RJ-45 Connector for the 10 Base-T Ethernet link, and a 3 pin
Phoenix plug for connection to A-B networks. Power is supplied via a 2 pin Phoenix
type plug which allows for 9-27 Volts DC to be connected. Included is a RS232 DB9
Configuration Port for access to the BIOS and Flash Burn Utilities.

Configuration of the operating parameters is done quickly and easily via the Ethernet
Link by Telnet or the supplied Lantronix Device Installer software. Serial port
encapsulation of the DF1 protocol over TCP/IP is handled by the supplied COM Port Redirector software also supplied by Lantronix. Current releases of the software can be
obtained from Lantronix’s Website.

There is also the option of RAW tunneling of DF1 using other Ethernet TCP/IP drivers
such as Kepware.

This Section contains information of the physical position and purpose of the components of the DL4500.

The top row contains the following connectors. Going left to right.

2 pin Power Connector

A-B Network 3 pin Screw terminal (Phoenix Type)

The LED’s on the left side going from top to bottom.

Ethernet Activity (TX/RX)

A-B Network Status

DL4500 Operating Mode and Status.

The LED’s on the right side going from top to bottom.

Ethernet Activity (TX/RX)

Lantronix COBOX Diagnostic LED.

10 Base-T Ethernet Link Status

The RESET pushbutton is on the left side, the Configure pushbutton is on the right side.

The bottom side of the DL4500 has the following connectors: Going Left to Right.

9 Pin DM9M connector for Configuring the BIOS and Firmware

RJ-45 connector for 10 Base-T Ethernet communications

3. Mode of Operation

3.1 Online Mode of Operation

Online Mode is the normal operating Mode of the DL4500. In this mode the Channels
are now configured as they are defined by the A-B Network and Configuration. The
DL4500 is ready to interface your equipment.
The Reset pushbutton automatically puts the DL4500 into Online mode.

3.2 Offline Mode

Once the Configure Pushbutton is pressed the Offline BIOS Manager is started. Using
either the DL32 configuration software and the “DL Offline Manager” option or a
Windows Hyper Terminal type program with com port settings of 9600 Baud, 8,N,1 and
Xon/Xoff flow control.

Once pressed you will be asked “Restore EEPROM to defaults (Y/N)?” If the answer
is “Y”es then the Online parameters will be reset to defaults of Address 1, and
settings of 9600,N,8,1 on the communication Channel to the COBOX.

Write New Firmware

Once pressed the message “This *WILL* overwrite DATALINK system code enter
(Y/N) to proceed” will be displayed. Hit “Y” and the next message will appear
telling you that it is alright to send the new firmware to the Flash;
ERASING FLASH, PLEASE WAIT...

SEND FIRMWARE TEXT FILE NOW...

Once the message to send the firmware appears then either click on the “Burn Flash
System File” button to select the .txt file to send, or send the Text File under
HyperTerminal.

Wait for an “*A-OK* BURN COMPLETE!” message to appear.

Memory Dump

This is used to display the RAM memory of the DL4500. This should only be done
after contacting Equustek Solutions to debug problems.

Off-Line Diagnostics

Starts a series of tests to test the DL4500’s hardware and should only be done if
instructed so by a trained person.

Debug Mode

Starts up a DL4500 internal Debug mode that can be used by trained personnel to
debug problems and check hardware configuration and operation.

Firmware Version

Once selected the current DL4500 model and version numbers will be displayed. Can
be used to check the correct firmware was burnt into the Flash or if the DL4500 has
the most up to date firmware in the Flash.

Online

Does a soft “software” reset of the unit to put it online. This will NOT reset the
COBOX (Ethernet) hardware.

4. Switch and LED Indicator Functions

4.1 Switch Functions

Reset Pushbutton

The Reset pushbutton will perform a complete hardware reset of the DL4500. It is
identical to a complete power cycle and will cause the DL4500 to go through its LED
start-up sequence as defined in Section 5.2.1. A complete hardware reset is needed on
changing any online operating parameters.

Configure Pushbutton

The Configure pushbutton takes the DL4500 out of On-Line operation mode and puts it
in the BIOS Manager mode. When this mode has been entered the Ethernet and Status
will be RED and A-B Network will be out. To put the unit back On-line it is necessary to
either press the Reset or cycle the DC power supplied to the DL4500.

4.2 Indicator Functions

4.2.1 Power-Up and Reset Sequence

On Power-up or after the Reset button has been pressed the DL4500 executes a self
diagnostic check-up or the ram and flash firmware. The correct LED indicator sequence
to show the DL4500 is functioning properly is as follows: After all LEDS go out.

LED

Status

Power

Green Continuously

Status

Green for 0.5 seconds

A-B Network

Green for 0.5 seconds

Ethernet

Green for 3 seconds

After this sequence the DL4500 goes into the On-line mode of Operation. The LED
indicators will behave in the certain way defined by the DL4500 model used. Most likely
the A-B Network will be solid or flashing depending on the A-B Network used.

4.2.2 Normal On-line Operation

The following is a description of the normal operation of the LED’s on the DL4500.

LEFT LED’s

Description of Operation

Power

Green Indicates Power is being supplied to the DL4500.

Ethernet

Flashes GREEN for 0.5 seconds when a character is Received or
Transmitted. If Characters are being received of transmitted faster
than this then it might appear the LED is on SOLID. Flashes RED
for 0.5 seconds if a NAK is received or transmitted. Will also
flash if all serial communication buffers are full.

A-B Network

(DH+ )
On Hardware Reset will flash GREEN and RED until a valid DH+
network is detected. This is the AUTO BAUD Rate detection
mode, the DL4500 will automatically connect at the DH+ speeds
of 57.6K, 115.2K and 230.4K Baud. LED will switch to on solid once the DL4500 is on the DH+ network as a valid node address.
LED will flash GREEN when the DH+ is set to a certain Baud rate
but is not on network.

(DH-485)
On Hardware reset the A-B Network will flash GREEN at a 1
second rate when the DH-485 is not on network. Once a valid
network is running the LED will flash GREEN much more rapidly
(approx. every 0.1 seconds), the rate depends on how busy the
network is.

Status

Used for Determining Operating Mode and DL4500 Status

RIGHT LED’s

Description of Operation

TX/RX

Lights Solid green to indicate an Ethernet socket is idle. Blinks
green to indicate an Ethernet socket has been established and
active.

Diagnostic

Blinks or lights solid red in combination with TX/RX led to
indicate diagnostics and error detection.

Link

Lights Solid Green to indicate Ethernet Port is connected to the
10Base-T network.

4.2.3 On-Line, Power-Up and Reset Errors

The following table describes the meaning of LED patterns if the internal diagnostic tests
detect an error on Reset/Power-Up.

LED Pattern

Description of Problem

Ethernet, A-B Network,
and Status Flashing
RED

The flash has not be burnt properly and the A-OK was
not transmitted. Please reburn the flash with the correct
text file. Contact Customer Support for help.

Ethernet, A-B Network,and Status Solid RED

The BIOS has been corrupted. A new Flash Chip has to
be supplied by the factory. Please contact Customer
support.

Start-upSequence keepsrepeating

The DL4500 EEPROM is corrupt.. Please Restore to
Factory Settings (See Section 4.3) and then reconfigure
the unit.

A-B NetworkFlashing RED

There is a duplicate node on the A-B network. The
DL4500 has been assigned a node address that is already
in use.

The following table describes the meaning of LED patterns in the different Off-Line
modes of operation.

LED Pattern

Description of Problem

Ethernet & Status SolidRED

BIOS Manager

Ethernet & Status Solid Green A-B NetworkSolid Red

Offline Hardware Diagnostics Testing Mode

Ethernet Solid Red A-BNetwork & Status Solid Green

Offline Debug Mode.

5. Configuration

The following sections describe how to setup and configure your DL4500 for the desired
online operating parameters. To configure your DL4500, the following software will be
needed.

Open a Saved Configuration

When the Configure option is selected from the EQ32 main menu, the first screen will give the option to open a saved configuration file. To open a saved configuration file, put a check beside the Open a Saved Configuration File option.

Creates a virtual COM port and redirects it to the PC’s Ethernet port.

DL32 Configuration

Used to reburn the firmware for the DL4500 when
upgrading or changing from Multi Master to Standard
Tunnel or vice versa.

After the IP address of the DL4500 is assigned, you must then telnet to the DL4500 to
setup the internal communications between the Lantronix daughter board and the
DL4500 motherboard. These settings are reset every time an IP address is assigned.

5.1 Device Installer

The Device Installer is used to configure the IP address of the DL4500 as well as
configure the internal communication settings between the Lantronix daughter board and
the DL4500 mother board. The most recent version of Device Installer is Device
Installer 3.6.

5.1.1 IP Address

To assign an IP address to the DL4500, open the Device Installer Software. You will
then see a screen as shown below.

The following steps are used to assign an IP address to the DL4500.

1. Click on the Search button to have the Device Installer find the DL4500. If the
Device Installer finds the DL4500, the device should appear. If the device cannot be
found then follow the instructions at the end of the IP Address section.

2. Highlight the device and click on the Assign IP button. Choose the “Assign a specific
IP address” option and click Next. The following window will appear.

4. To assign the chosen IP address to the DL4500, click the Assign button. When the IP
address is assigned, a message stating that the IP address was successfully assigned
should appear. Click the Finish button to close the screen and go back to the main
menu.

Device Not Found

If for some reason the Device Installer cannot find the DL4500 on the Ethernet network,
follow the steps below.

1. Click the Assign IP button and the following screen will appear.

2. Enter MAC address of the DL4500 and click Next. This can be found on the bottom
of the DL4500. The Device Installer should now find the device. Now follow the
steps at the beginning of the IP Address section to assign an IP address. If for some
reason the device still cannot be found, see section 9.1 Device Installer Cannot Find
the DL4500.

5.1.2 Telnet

After the IP address of the DL4500 is assigned, the internal communication parameters
that the Lantronix daughter board uses to communicate with the DL4500 motherboard
must be configured. Depending on the model of DL4500 that is being used, there are
different Telnet settings that must be set. The Telnet settings for each model of DL4500
are shown below in the following order: DF1 MultiMaster, Standard Tunnel, and Modbus
TCP.

To start a telnet session, there are two ways that can be used. The first method uses the
Device Installer while the second uses a DOS command prompt.

Telnet using Device Installer

Open Device Installer and click search to find the DL4500. Once the device is found,
double click on the device and three tabs will appear on the right window frame. Select
the Telnet Configuration tab and the following should appear.

Make sure port 9999 is entered and click Connect to begin the Telnet session.

Telnet using the DOS Command Prompt

Open a DOS command prompt window to begin. At the prompt, type telnet then a space,
the IP address of the unit then a space, and then the port 9999. After this is entered, press
Enter to begin a telnet session. The following is an example of how to begin a telnet
session from the command prompt.

C:\>telnet 192.168.2.2 9999

On the following pages are the Telnet settings for the different DL4500 models. After
starting a telnet session, you must press the Enter key to bring up the main menu.

To set the proper Telnet settings, follow the steps below :
1. Press R to restore Factory Defaults.
2. Press 2 to configure the DF1 Settings. Input the values so that they match what is
shown below. The values shown in the parentheses are the current settings. To keep
the current settings, press Enter.

To set the proper Telnet settings, follow the steps below :
1. Press 7 and then Enter to restore Factory Defaults.
2. Press 1 and then Enter to configure the Channel 1 configuration. Input the values so
that they match what is shown below. The values shown in the parentheses are the
current settings. To keep the current settings, press Enter. The only value that needs
to be changed is the baud rate.

The ComPort Redirector is used to redirect a virtual COM port to the Ethernet port. This
software is needed since RSLinx does not offer an Ethernet DF1 driver. Therefore an
RS-232 serial driver is used and the ComPort Redirector redirects the data to the Ethernet
port.

5.2.1 Configuration

To begin configuring the ComPort Redirector, open the software and the following
screen will appear under tolls click on lunch CPR manager.

To configure the ComPort Redirector, use the following steps.

1. Click the Add/Remove button to add a virtual COM port to be redirected. The
following screen will appear, inaccessible comports will be different depending on
what ports are being used on each computer.

2. Select the COM port that you want to use a virtual COM port and click OK. You will
then be returned to the first screen. Whenever a COM port is added or removed, you
may need to reboot your PC before the COM port can be used. The PC can be
rebooted after the ComPort Redirector has been configured and saved.

3. From the main screen, click on the new COM port that you want to configure.

4. Enter an IP address and TCP port to where that COM port will be redirected to. The
IP address will be the address assigned to the DL4500, Put a checkmark beside
Timeout Reconnect, Server Reconnect more details in sec port settings 5.2.2, then
click on Save.

5. Confirm save, click on Yes to finalize the setup.

6. CPR manager windows will be as shown after save.

7. Close CPR window, it is recommended to reboot your computer at this point.

5.2.2 Port Settings

The follow section provides more details about the different port settings available with
the ComPort Redirector software. This information was obtained from the Lantronix
ComPort Redirector User Manual.

Buffer Writes :

The follow section provides more details about the different port settings available with
the ComPort Redirector software. This information was obtained from the Lantronix
ComPort Redirector User Manual.

Server Reconnect :

If selected, enables the com port to reconnect to the device server
after the device server disconnects from CPR.

No Net Close :

If selected, when an application closes the com port, CPR does not close
the network connection. To disconnect CPR from the device server, right-click the com
port in the com port tree view on the left or in the Com Port List on the right, or select
Disconnect on the Com Port menu.

Connection Timeout (in seconds) :

Number of seconds the com port should wait before
attempting to connect to the next device server in the list, or before aborting the
connection attempt.

Timeout Reconnect :

If selected, CPR re-establishes the connection if the connection
times out. When auto-reconnecting, CPR tries to reconnect until the connection succeeds
or the number of tries reaches the value in Reconnect Limit

5.3 DL32 Configuration Software

The DL32 software is only required when updating the firmware of DL4500.

5.4 Allan-Bradley Network Configuration

The DH+ or DH-485 requires that every station on the network has its own node address.
This section describes the configuration of the DL4500 for the desired A-B network.

5.4.1 DH+ Node Address

The DH+ network allows up to 64 nodes on a network with addresses ranging from 0 to
63 decimal. The DL4500 DH+ node address is determined from the last octet of the IP
address assigned to the unit. The following table shows how the DH+ node address is
determined from the last octet of the IP address.

If the last octet of the IP address is larger than 63, subtract 64 from the value until it falls
within the range of 0 to 63. This will be the DH+ node address in decimal. Since DH+
uses octal notation, a conversion decimal to octal will be needed.

Ex. DL4500 with IP Address 192.168.2.170
Solution
Take the last octet and subtract and keep subtracting 64
until the value falls within the range of 0 to 63.
170 - 64 - 64 = 42
The DH+ node address is 42 decimal or 52 octal.

5.4.2 DH+ Baud Rate

The DH+ Baud rate on the DL4500 is auto detecting; whatever the existing network is set
to the DL4500 will use that baud rate. Valid rates of 57.6K, 115.2K and 230.4K Baud
are supported.

On Hardware Reset the A-B Network LED will flash GREEN and RED until a valid
DH+ network is detected. This is the AUTO BAUD Rate detection Mode and the
DL4500 will stay in this mode until a valid network is connected to the A-B Network
Connector. The A-B Network LED will then switch to on solid once the DL4500 is on
the DH+ network as a valid node address.

5.4.3 DH-485 Node Address

The DH-485 network allows up to 32 nodes on a network with addresses ranging from 0
to 31 decimal. The DL4500 DH-485 node address is determined from the last octet of
the IP address assigned to the unit. The following table shows how the DH-485 node
address is determined from the last octet of the IP address.

If the last octet of the IP address is larger than 31, subtract 32 from the value until it falls
within the range of 0 to 31. This will be the DH-485 node address in decimal.

The DH-485 Baud rate will set itself to 19.2K if the Serial Interface was set to 19200 or
Higher. Otherwise it will use 9600 for a 9600 baud and 4800 for 4800 baud.

6. Firmware Upgrade

There may be times when the firmware in the DL4500 needs to be upgraded. Some of
theses times include installing newer firmware or switching from DF1 MultiMaster to
Standard Tunnel or vice versa.

The DL4500 has two different types of firmware that need to be upgraded. Depending on
what needs to be upgraded, one or both firmware may need to be upgraded. If switching
the firmware in the DL4500 from one model to another, then both of the firmwares will
need to be upgraded (ie. changing from DF1 MultiMaster to Standard Tunnel).

To upgrade the firmware in the DL4500, follow the procedure outlined below.

6.1 Device Installer

The Device Installer is used to upgrade the Ethernet firmware. To upgrade the Ethernet
firmware open the Device Installer and follow the procedures outlined below. You will
see the following window when the Device Installer is opened.

1. After opening the Device Installer, click the Search button. The Device Installer
should find the DL4500. If successful, the device should show up on the screen.

2. Highlight the device by clicking on it and press the Upgrade button to install new
firmware. The following window will appear after pressing the Upgrade button.

4. Select the firmware to be installed by clicking the browse button and choosing the
appropriate firmware file. After this is done, click Next.

5. Select the No other files to install option and click Next to proceed.

6. To begin the firmware upgrade click Next.

7. If the firmware has been successfully installed, you will see the following screen.
The Device Installer can now be closed.

6.2 DL32 Configuration Software

The DL32 Configuration Software is used to upgrade the firmware on the DL4500
motherboard. This firmware is responsible for the DH+ and DH-485 networks.

In order to upgrade the DL4500 firmware, follow the procedure below.
1. Open the DL32 Configuration and select DL4500 Models. You will see the following
screen.

2. Select the COM port attached to the DL4500 and click the DL Offline Manager
button. You will be prompted to press the configure button on the DL4500. The
following Menu will be shown in a new window.

4. After the message Send firmware text file now appears, press the button Select Flash
System File located in the top left corner of the window.

5. When the Send Flash System File button is pressed, a message box will appear asking
if the WRITE new Firmware option was selected. Click Yes to continue.

6. Select the desired firmware file and the DL4500 will begin upgrading the firmware.
Upon a successful install, the following text will appear.

*A-OK* BURN COMPLETE!

7. The DL32 Configuration Software can now be closed. Press the Reset button on the
DL4500 to put it online.

7. Wiring Diagrams

This section contains the information required for connecting your DL4500 to Allan
Bradley’s DH+ and DH-485 networks. It also contains wiring diagrams for building an
RS-232 null modem cable which is used to connect serially to the DL4500.

7.1 DL4500 Pin out Diagram

Below is an image of the DL4500 that shows the numbering of the DH+/DH-485
connector. Pin 1 is located closest to the power connector.

7.2 RS-232 Null Modem Cable

The RS-232 null modem cable is used to serially connect to the DL4500 in order to use
the DL Offline Manager or configure the device using the DL32 Configuration Software.

7.3 DH+ Cable

Below is a diagram of the DL4500 DH+ connector. Pin 1 is the pin closest to the power connector.

7.4 DH-485 Cable

Below is a diagram of the DL4500 DH-485 connector. Pin 1 is the pin closest to the
power connector. Note that Shield cannot be replaced by Common.

8. DL4500 Typical Applications

The DL4500 is designed to be used in applications using Ethernet to communicate with
devices on a DH+ or DH-485 network. Some of the typical applications that use the
DL4500 are shown in this section.

8.1 DL4500-EDH+

The following example shows a PC using tunneled DF1 over Ethernet with a DL4500 to
communicate with the PLC’s and other devices on the DH+ network.

8.2 DL4500-EDH-485

The following example shows a PC using tunneled DF1 over Ethernet with a DL4500 to
communicate with the PLC’s and other devices on the DH-485 network.

9. Frequently Encountered Problems

This section outlines some of the most frequently encountered problems when trying to
configure the DL4500. If the problem you are having is not located in this section, please
contact technical support.

9.1 Device Installer cannot find the DL4500

If for some reason the Device Installer software cannot find the DL4500 on the Ethernet
network, it can possibly be because one of the following problems:

1. Another device on the Ethernet network has the same IP address that is
currently assigned to the DL4500.

2. The DL4500 may have an IP address in which the network ID portion
of the address does not match the network ID that is being used by the
Ethernet network.

In order to assign an IP address to the DL4500, the address resolution protocol (ARP)
will be used. Using the ARP command will only temporarily change the IP address in
the device. To configure the unit so that it keeps the IP address, you must telnet to the
unit and change its IP address from the configuration menu. In order for the ARP
command to work in Windows 95, the ARP table on the PC must have at least one IP
address defined other than its own. To use the ARP command to assign a temporary IP
address, follow the steps below.

1. Open an MS DOS command prompt window.

2. At the command prompt, type the following to view the ARP table.

arp –a

To add another value to the ARP table, ping another device on the current network.

3. Use the following ARP command to add the DL4500 to the ARP table.

arp –s xxx.xxx.xxx.xxx aa-bb-cc-dd-ee-ff

The first entry after the arp –s is the IP address that you wish to temporarily assign to
the DL4500 (denoted by xxx.xxx.xxx.xxx). The next entry is the MAC address of the
DL4500 which can be located on the bottom of the unit (denoted by aa-bb-cc-dd-eeff).

4. Open a telnet session to the DL4500 using port 1. This is done by typing the
following at the command prompt.

telnet xxx.xxx.xxx.xxx 1

The connection will fail when this is done, but will temporarily change the IP address
of the DL4500 to xxx.xxx.xxx.xxx.

5. Finally open another telnet session but this time to port 9999 as follows.

telnet xxx.xxx.xxx.xxx 9999

6. Set the IP address of the DL4500 by changing the Network or Server settings from the
main menu of the telnet session. The IP address assigned here will become the
permanent IP address of the DL4500.

Appendix A : TCP/IP Tutorial

This section is design to guide you to gain a brief understanding to TCP/IP addressing
mechanism and the meaning behind the DL4500 IP configurations. TCP/IP suite is the
most commonly used Ethernet communication protocol in both industrial and commercial
networking applications. The protocol implements a two-level addressing mechanism in
order to assign a computer or other Ethernet device (1) its Node Address (Host ID), and
(2) its Network Address (Network ID). With the node address, the Ethernet device can
identify itself on a network; with the network address, the Ethernet device can identify
the network in which it belongs to, and facilitate communication among computers across
different networks.

Analogy

The node address is analogous to the suite number in an apartment, and the
network address is equivalent to the residential number of the entire apartment
building. When my friends want to visit me, I must give them both my suite
number and the residential number of the apartment in which I live in, else they
wouldn’t be able to find my place.

A.1 IP Address

TCP/IP uses a four-segmented number set to store the node address and the network
address; the number in every segment varies from 0 to 255, and segments are separated by decimal points. This segmented number set is called the IP Address, and has the
appearance of XXX.XXX.XXX.XXX.

At this point, one may start to wonder how to identify the node address and the network
address from the four number segments. Sadly, with only the IP address, no one can
meaningfully separate the node address from the network address, not even computers.
What is needed in addition to IP address is the Address Delimiter – The Subnet Mask. A
Subnet Mask has the same format as the IP address (XXX.XXX.XXX.XXX); however,
the segments are usually filled with either 255 or 0.

When combining IP address with Subnet Masks, the node address can be separated from
the network address in this way: (1) the node address is the IP address segment that maps
to the Subnet Mask segment(s) that is/are filled with 0; (2) the network address is the IP
address segment that maps to the Subnet Mask segment(s) that is/are filled with 255.

Note : The IP address/Subnet Mask mapping rule introduced above is generally true for most of
the TCP/IP networking applications; in some specialized networks, network
administrators can enter numbers other than 255 or 0 in the Subnet Mask segments for
network customizations. However, this advance TCP/IP application is beyond the scope
of this tutorial.

A.4 Valid IP Addresses

Although the IP address / Subnet Masks couple gives a phenomenally large number of
possible combinations of node/network address, only certain combinations are “valid”.
Here are some general classifications of valid IP addresses :

Local Area Network

192.168.x.x

This set of IP addresses is reserved for addressing in Local Area Network (the network
that is not connected directly to the internet, but through routers or gateways).

127.0.0.1

This IP address points to the Node itself. (Loopback Address)

0.0.0.0

This IP points to current network.

Node Address of 255

This IP address points to every nodes on the network. (Broadcast Address)

Node Address of 0

This IP address points to the entire network with the network address described in the IP
address.

Wide Area Network / Internet

When connected to the internet, network nodes must use the IP Addresses from the
following Categories:

Class A IP Address

IP addresses with the first segment ranging from 1 to 127, and subnet mask 255.0.0.0.

Class B IP Address

IP addresses with the first segment ranging from 128 to 191, and subnet mask
255.255.0.0.

Class C IP Address

IP addresses with the first segment ranging from 192 to 223, and subnet mask
255.255.255.0.

Class D IP Address (Multicast)

IP addresses with the first segment ranging from 224 to 239.

Class E IP Addresses (Reserved)

IP addresses from 240 and above in the first segment.

Note:

1. These IP address regulations are weakly enforced; users are allowed to
violate these rules. In Local Area Network applications, IP rule violation will
not cause problems on network connectivity. However, when connected to
the internet, users are expected to strictly conform to the IP regulations to
ensure valid connectivity. For more in-depth information on IP address
regulation, please consult your networking administrator.

2. Since 1993, the “Classful” IP address regulation has no longer been the only
IP rules implemented on the internet. Many inter service providers (ISPs)
adopted class-less IP address regulations, in which the IP address / Subnet
Mask couple is interpreted differently than in classful IP address. Detail
information on class-less IP address regulations is out of the scope of this
tutorial.

Appendix B : RSLinx Setup

This section will assist in setting up RSLinx to communicate with the DL4500. Before
continuing make sure that the DL4500 and the ComPort Redirector has been configured.
To setup RSLinx, follow the steps below.